Drawstring (noun)

A cord or ribbon that is pulled to close or adjust something, typically a garment or bag.

Origin:

A string or cord which are used to draw something closed or tight.

Examples:

1. The hoodie has a drawstring that can be adjusted to fit snugly around the face.
2. The bag has a drawstring closure that keeps the contents securely inside.
3. The pants have a drawstring waistband that can be adjusted for a comfortable fit.
4. The dress has a drawstring neckline that can be adjusted to show more or less cleavage.
5. The shorts have a drawstring waist that can be adjusted to fit comfortably.